Optimal sensor fusion method for active vibration isolation systems in ground-based gravitational-wave detectors

@article{Tsang2021OptimalSF,
  title={Optimal sensor fusion method for active vibration isolation systems in ground-based gravitational-wave detectors},
  author={T T L Tsang and T. G. F. Li and Thomas Dehaeze and Christophe Collette},
  journal={Classical and Quantum Gravity},
  year={2021},
  volume={39}
}
Sensor fusion is a technique used to combine sensors with different noise characteristics into a super sensor that has superior noise performance. To achieve sensor fusion, complementary filters are used in current gravitational-wave detectors to combine relative displacement sensors and inertial sensors for active seismic isolation. Complementary filters are a set of digital filters, which have transfer functions that are summed to unity. Currently, complementary filters are shaped and tuned… 
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